<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="dialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEdit(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteEdit(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 创建角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="dialogVisible" width="30%" @close="addDialog">
      <!-- 内容主体区域 -->
      <el-form :model="addUserForm" :rules="rules" ref="ruleForm" label-width="80px" class="demo-ruleForm">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addUserForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addUserForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addNewUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="30%">
      <!-- 内容主体区域 -->
      <el-form :model="editUserForm" :rules="ruless" ref="editRuleForm" label-width="80px" class="demo-ruleForm">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editUserForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editUserForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editNewUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      //控制添加角色对话框
      dialogVisible: false,
      //控制修改角色对话框
      editDialogVisible: false,
      rules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 6, message: '长度在 2 到 6 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: false },
          { min: 0, max: 6, message: '长度小于 6 个字符', trigger: 'blur' }
        ]
      },
      //添加角色的表单数据
      addUserForm: {
        roleName: '',
        roleDesc: ''
      },
      //查询到的用户对象信息
      editUserForm: '',
      ruless: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 6, message: '长度在 2 到 6 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: false },
          { min: 0, max: 6, message: '长度小于 6 个字符', trigger: 'blur' }
        ]
      },
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightlist: [],
      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点ID值数组
      defKeys: [],
      //当前即将分配权限的角色ID
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.rolelist = res.data

      // console.log(this.rolelist)
    },
    //监听创建角色对话框关闭事件
    addDialog () {
      this.$refs.ruleForm.resetFields()
    },
    //点击按钮添加新角色
    addNewUser () {
      this.$refs.ruleForm.validate(async vaild => {
        if (!vaild) return //this.$message.error('添加失败！')
        const { data: res } = await this.$http.post('roles', this.addUserForm)
        if (res.meta.status !== 201) {
          this.$message.error('创建角色失败！')
        }
        this.$message.success('创建角色成功！')
        //隐藏添加角色的对话框
        this.dialogVisible = false
        //重新获取角色列表
        this.getRolesList()
      })
    },
    //展示编辑角色的对话框
    async showEdit (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色信息失败！')
      }
      this.editUserForm = res.data
      this.editDialogVisible = true
    },
    //修改角色信息并提交
    editNewUser () {
      this.$refs.editRuleForm.validate(async vaild => {
        if (!vaild) return
        //发起修改角色的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editUserForm.roleId, {
          roleName: this.editUserForm.roleName,
          roleDesc: this.editUserForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色失败！')
        }
        this.$message.success('更新角色成功！')
        //关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getRolesList()
      })
    },
    //根据ID删除对应的角色信息
    async deleteEdit (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      //如果用户确认删除，则返回值为字符串confirm
      //如果用户取消了删除，则返回值为字符串cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消')
      }
      // console.log('确认了删除');
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败！')
      }
      this.$message.success('删除用户成功！')
      this.getRolesList()
    },
    //根据ID删除对应的权限
    async removeRightById (role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除操作！')
      }
      // console.log('确认了删除！');
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        this.$message.error('删除权限失败！')
      }
      // this.getRolesList()
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      //把获取到的权限数据保存到data中
      this.rightlist = res.data
      //递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    //通过递归的形式，获取角色下所有三级权限的ID，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      //如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys);
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      
      this.setRightDialogVisible = false
      this.getRolesList()
    }
  }
}
</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
